linux builds php performance analysis tool

First on the renderings: Installation environment Centos,php7,MongoDB3,nginx php extension mongodb: http://pecl.php.net/package/mongodbtideways_xhprof: https://github.com/tideways/php-xhprof-extension Install MongoDB3 By default, MongoDB2 is installed in my environment yum. xhgui requires version 3 or above. Create a yum source for MongoDB3 vi ...

Posted by jalapena on Sat, 11 Apr 2020 17:27:35 +0200

PHP string operation (string replacement, deletion, truncation, copy, connection, comparison, search, including, case conversion, cutting to array, etc.)

1, String substitution str_replace("iwind", "kiki", "i love iwind, iwind said"); //Will output "i love kiki, kiki said" str_replace(find,replace,string,count) parameter description Find required. Specifies the value to find.   Replace required. Specifies the value to replace the value in find.   String required. Specifies t ...

Posted by lazy_yogi on Sat, 11 Apr 2020 11:46:08 +0200

Tron blockchain PHP docking development package [support USDT-TRC20]

The TronTool development package is suitable for rapidly increasing the support ability of Tron/USDT-TRC20 digital assets for PHP applications, that is, it supports the application scenarios using its own Tron blockchain nodes, and also supports the lightweight deployment scenarios based on the official public API services of Tron. Official dow ...

Posted by Calcartman on Thu, 09 Apr 2020 17:42:20 +0200

Linux -- install and configure Android SDK

1. Download Android SDK http://tools.android-studio.org/index.php/sdk/ I downloaded: Android sdk_r24.4.1-linux.tgz 2. Unzip Android SDK Copy the Android sdk_r24.4.1-linux.tgz file to a directory in the Linux file system. My directory is / usr/local/ Execute command decompression: tar -zvxf android-sdk_r24.4.1-linux.tg ...

Posted by Alith7 on Mon, 06 Apr 2020 03:55:11 +0200

Specify the number, sum, and minimum of arrays to get a set of random numbers

Specify the number, sum, and minimum of arrays to get a set of random numbers The original requirements are as follows: Given sum SUM(A), given minimum number M, given length S of sequence, and precision P of each number in sequence, It is required that each number in the sequence must meet the requirements of a > = m, accur ...

Posted by Kev on Sat, 04 Apr 2020 11:43:31 +0200

php design pattern observer pattern

In web applications, generally, some small-scale data and business changes, and other relevant business data also need to change. In this case, observer pattern is very suitable. Observer mode is usually implemented by using an interface called observer. If other classes want to introduce observers, they need to implement this interface For e ...

Posted by aron on Sat, 04 Apr 2020 01:01:23 +0200

The UTF-8 coding problem of Jenkins

Jenkins is easy to get cramped sometimes. I configured the code in tomcat, which is not easy to use. I started because of the problem of nginx's reverse proxy, but later found out that Tomcat became a demon. The solution is to copy my Tomcat configuration, and then add parameters and modify on my basis. Error screenshots ...

Posted by rfrid on Thu, 02 Apr 2020 22:30:04 +0200

Powerful and elegant list derivation expression in python

The derivation expression is actually to simplify some loop judgment operations, etc How many ways can you generate a list of numbers 1-10? >>> l = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ] >>> l [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] >>> >>> l = [] >>> for x in range( 1, 11 ): ... l.append( x ) ...

Posted by tinuviel on Thu, 02 Apr 2020 21:38:33 +0200

BZOJ4710: [Jsoi2011] special products (principle of tolerance and exclusion + combinatorial mathematics + DP)

Title gate: http://www.lydsy.com/JudgeOnline/problem.php?id=4710 Topic analysis: at first, I didn't have a clue at all. Later, I found out that this is just like the second kind of stirling number? First of all, consider how to do without the condition that everyone should take at least one specialty. Because different speci ...

Posted by Paulkirkewalker on Tue, 31 Mar 2020 19:10:03 +0200

Detailed explanation of PHP FFI -- a new PHP extension method

  With PHP7.4, there is an extension that I think is very useful: PHP FFI (Foreign Function interface), which refers to a description in PHP FFI RFC: For PHP, FFI provides a way to write PHP extensions and bindings to C libraries in pure PHP. Yes, FFI provides high-level languages to call each other directly. For PH ...

Posted by Johan Beijar on Mon, 30 Mar 2020 12:07:14 +0200